Final answer:
The most common method to locate objects indoors is triangulation, which uses angles from known points to determine the position of an object, typically with the aid of Wi-Fi or Bluetooth beacons.
Step-by-step explanation:
The most common method to locate objects in an indoor area uses triangulation. Triangulation involves using two or more known locations to find the position of an object based on the angles from these known points. This method is often used in combination with technology such as Wi-Fi or Bluetooth beacons that emit signals which can be used to calculate the position of an object within an indoor space.
The techniques mentioned like using rectangular coordinates or compass points are also viable but are typically less common for dynamic indoor positioning systems. Rectangular coordinates provide a grid-based system for locating objects, which would require extensive mapping. Compass points might be used for orientation but are insufficient for precise location tracking without additional reference points.